Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa30c36b07de9cb…

MALICIOUS

PDF

78.6 KB Created: 2021-09-17 23:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 897a704230274880796d297fad1644e5 SHA-1: f47f95e07cdeedf87d5b5e8340ff62d8b0d686dd SHA-256: 5aa30c36b07de9cb6adccb9a3c41ca6c7c7cefbe998e1ea0b47383d02e41021e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links within seemingly legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://goldgreiner.de/userfiles/file/luzimiki.pdf In PDF document text
    • http://kompassztuki.pl/Image/files/rajepukurorati.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210906225656.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/13468988569.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/35089397423.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/lekijoxes.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/75070131201.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/4b89917537e0ec16f56c8273e2f08e1b/68425088078.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/8329937415.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-05/images/files/nubinosozuxaw.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/65656406265.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131dbec5136d---70242194452.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/19956426940.pdfIn PDF document text
    • http://halaljones.com/uploads/files/pofipokijelexuwaz.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/30175379280.pdfIn PDF document text
    • http://geasit.it/userfiles/files/7841894652.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/75146718575.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/tirapapozitefarasad.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/fazija.pdfIn PDF document text
    • https://banghenails.com/upload/file/45029012661.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/bolevivu.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/bitikegotibadov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+check+deleted+messages+on+android+phonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02E 16644 bytes
SHA-256: dcfeb7d5be3b735d43c071164d96920b71fc34760c223795481180a09389543e
font_01_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 11132 bytes
SHA-256: 6f9167ae9f3e18cdd8ed7016ff75cc84daa8dffbbd7c534de8faa044a53cebe8

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